A coffee grinder can be used for many (healthier) kitchen tasks than grinding coffee beans.
I use my coffee grinder mostly for grinding flax seed. You can also use it to grind other seeds and nuts. And it’s great for grinding dried herbs.
How to buy a coffee grinder
You can find some pretty expensive coffee grinders on the market, but I’ve found that my inexpensive Mr. Coffee coffee grinder does everything I need it to do (for a fraction of the price of the more expensive ones).